Friction-clutch.



H. L UUMFER.' FRIGTION LUTCH. APPLIOATIQN FILED APB. 14, 1909.

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Patented Dec. 7,' 1909.

citizen of the United States, residing at uchicago, Illinois, have invented certain new and use- UNITED sTArriasA PATENT oninon.

'HARRY A. CUMFER, or CHICAGO, ILLINOIS, AssIGNoR or ONE-HALF To FRANK ADAMS MITCHELL, or CHICAGO, ILLINOIS.

Specification of Letters Patent.

FRICTION-CLUTCH.

Patented Dec. 7, 1909.

Application led April 14, 1909. Serial No. 489,756.

To all whom it may concern:

Be it known that I, HARRY A. CUMFER,

in the county ofCook andState of ful Improvements in F riction-Clutches, of which the following is a specification.

This invention relates to friction clutches, and belongs with that class of clutches wherein annular wedges are moved lengthwise of the shaft `in opposite directions into contact with corresponding surfaces suitably arranged upon one member of the clutch to engage them. l

The object of this invention is the production of a clutch having pa-rtsof special construction and particular arrangement, whereby it is believed a -stronger, cheaper, and more effective clutch is made than any of those with which I am acquainted. K Like letters are employed to refer to the same parts throughout the description and drawings.

The construction and arrangement constituting this invention are set forth in the accompanying drawings, of Which- Figure 1 represents the lnvention in secl tion len thwise upon the abutting ends of two sha ts. The shafts are shown in full. Fig. 2 is a view looking from the right, after the right hand shaft end has been removed. f

Considering the drawings, the ends of the two alined shafts are marked A and B. A.

`cone C is movable on shaft B and lengthwise thereof by means of the split collar D inovably located between the parallel flanges E and F of the body of the cone C. Two arms G and II are pivotally supported on the split ring .l by means of the ears y'. The ring J is itself supported upon the sleeve K, which sleeve is inovable'on shaft B, and is foi-ined usually integrally with the annular wedge Each of the arms Gr and II has an end in contact with the cone C. and the 4opposite ends of the arn'is, which are the pivoted ends, have cams g and 71, formed on them. The cams g and 7L bear against awiih ported thereby.

second annular wedge L which is movable upon the exterior of the sleeve K and sup- The tworannular wedges are normally separated by springs M located in suitable sockets formed in the adjacent faces of the annular wedges. The wedges when moved engage corresponding surfaces of the clutch ring N.' The surfaces thus engaged are referred to by the letters n and n. The clutch ring N is secured within an outer Acup-shaped "housing P by the key u2, and

the housing is secured. to the shaft A-by providing the hub g2 of the casing .P with a key In the operation of this invention, the

cone C is moved along shaft l toward the clutch, which causes the cams g and ZL to force the annular wedge L in the samedirection and to draw the annular wedge 7c in the opposite direction, bringing the wedges into contact with the surfaces n and n with great'pi'essi'ire, andA thus transmitting power from one shaft to the other.

Having now described the construction of this invention, and the mode of its operation, what I claim isz- 1. In a friction clutch, the combination with a shaft, of a cone movable along the shaft, an annular wedge having a sleeve niovably encircling the shaft, a ring secured upon the sleeve, arms pivotally supported by the said ring and having parts in contact with the said cone, an annular wedge movably supported on the exteriorl of the said sleeve, the said pivoted arms being provided with cams arranged to act upon 4the said lastmentioned annular wedge, springs interposed between tlie .wedges to hold them normally apart, and a separate clutch member having surfaces arranged adjacent to the inclined surfaces of the annular wed-ges.

2. In a friction clutch, the. combination with a. shaft, of a` cone movable along the shaft, an annular \\'c(lg ,ic having a sleeve inovahly encircling the shaft, a ring secured upon the sleeve, arms pivotally supported by the said ring and having parts inv contact the said cone, an annular wedge movably supported on the exterior of the said ing surfaces arranged adjacent to the insleeve, the said pivoted arms being provided `clned surfaces of the annulaifwe'dges. 1'0 with cams arranged to act upon-the said In testimony whereof I my signature last-mentioned annular Wedge, springs inin presence of two Witnessesffwv i terposed between the wedges to hold them HARRY A. CUMFER. normally apart', and a separate clutch lnem- Witnessesl ber comprising a eylindrleal housing having GEO. E. MAYER,

a ring secured Within it, the said ring hav- CILmLEs I. Co. 

